Abrasives.



G. VIRNEBURG.

ABRASIVE.

APPLICATION FILED APR. H, \914.

1,141,371 Patented June 1, 1915.

TINITED STATES PATENT ()FFICE. I

GEORGE VIRNEBUBG, OF CHICAGO, ILLINOIS.

ABRASIVI' Specification of Letters Patent.

Patented June 1,1915.

Application filed April 11, 1814. Serial No. 831,282.

T all whom it may concern:

Be it known that I, GEORGE Vmnnmmo, a 1 subject of the Emperor of Germany, residing at Chicago, in the county of Cook and State of Illinois, United States of America, have invented certain new and useful Improvements in Abrasives, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to abrasives and is particularly concerned with sand-paper, or sand-cloth, and other forms of abrasive coated fabrics.

It is the object of my invention to produce an abrasive fabric which maybe used effectively in a Wet finishing, smoothing .or rubbing process. v

Mvinvention assumes particular importance in the removal of paints, shellacs and varnishes from woodwork or other articles, where such removal is effected by the abrasive processes. In work of this kind, the hardened'shellac, varnish, or paint, or other coating, is frequently removed'by the ordinary sandpape'ring process and, in fact, this is the method heretofore almost universally employed. However, the work is extremelv unhealthful, since the fine particles of shellac, varnish or paint, or similar material, which are dislodged in the process are naturally thrown into the air and are being constantly inhaled by the workmen. The chemical properties of these materials are extremely injurious to the lungs and certain diseases have been prevalent among the finishers trade, due to this cause.

It is Well known that if this work is carried on wet the dislodged particles are keptfrom being thrown into the air and the difficulty is removed, but another difliculty I is immediately encountered, since the water which is employed disintegrates the sandpaper or'sand-cloth so quickly that a great deal of paper or cloth is required for a particular piece of work and a great deal of time is lost in constantly employing new pieces of paper or cloth, and the annoyance of this is so great that it is a question whether it isnot as great an evil asthe dry process. 7

However, my invention steps in and cures both "evils bv the provision of a sand-paper or sand-cloth, or other. abrasive fabric,-which may be given prolongued use in the wet process without disintegration. In other words, .the abrasive fabric which my invention provides may be used as effectively wet or dry, so that the safeguard as to health may be employed without incurring any substitute difficulties.

My inventionthus resides in a process of treating ordinary sand-paper or sand-cloth, or other abrasive fabric, in a compound for treating such paper or cloth, or other fabric, and finally in the manufactured. article itself.

In the accompanying drawing, I illustrate an abrasive-coated fabric forming the subject-matter of my inventionl Ordinary sand-paper or sand-cloth may be used. different degrees of fineness of the sand being, of course, available. This sandpaper or cloth comprises a rather stout back of a proper fabric coatedwith hot glue and then sprinkled with sharp sand. and then left to cool and dry. The piece of abrasivecoated fabric is then dipped in, painted with. or has applied thereto in some other suitable way, a compound which I have determined to be useful for my purpose by careful and prolonged experiment. lVhile it is very possible that other compounds may be used and that other proportions than those hereinafter specifically set forth may be emploved, I shall state specifically what my experiments brought me to in order that I may give those skilled in the art the best and most complete information. It will be understood, of course, that the scope of my invention is to be measured by that of the appended claims and not by this specification, which I make indetail so far as possible so that those skilled in the art may be duly advised.

The compound which I have specifically determined bv experiment to be a successful one is a combination of three primary compounds. which I shall designate A, B and C Compound A is as follows:

Benzin 58.00% Resin 41. 50% Lead oxid 50% Compound B is as follows:

Benzin 48. 00% Resin 51.40% Nickel oxid Compound C is simply beeswax.

These three compounds are mixed togetherin the following proportions:

Compound A; 12.50% Compound B 75.00% Compound C 12. 50%

The mixture of these compounds is prefmethod. The fabric and the coating of glue is impregnated throughout by this waterproofing compound. After the application of the compound to the abrasive-coated fabric, the fabric is left to dry and is then ready for use. By fabric I mean paper or cloth, etc., and I use this meaning in the appended claims. I a

The removal of varnish or paint is effectively carried out by. using comfortably cool water and a sponge. The surface to be Worked should be kept wet and the abrasive fabric used upon it at the same time. with considerable pressure. The fabric, due to its manufacture as above described, will not disintegrate, as I have will be an effective abrasive for the accomplishment of the work. At the same time, the Work will be dustless and the workmen will be free to breathe pure air instead of air mixed with the harmful particles which a dry varnish or paint removing process nee-- essarily forms.

ters Patent:

1. An article of manufacture comprising a piece of fabric, a coating of glue, and a found by test, and,

desire to secureby Letcoating of an abrasive, said fabric and coating being impregnated with a compound of a metal and an oil.

2. Asan article of manufacture, a piece of fabric, a coating of glue, and a coating of an abrasive, said fabric and coating being impregnated with a. compound of an oil, metal and wax.

3. An article of manufacture comprising piece of fabric, a coating of glue, and a coating of an abrasive, said fabric and coating being impregnated with a compound of an oil, the oxid of a metal, resin, and Wax.

' 4. As an article of manufacture, a piece of fabric, a coating of glue, and a coating of' a piece of fabric, a coating of glue, and a coating of an abrasive, said fabric and coating belng impregnated with a compound of a primary compound A consisting of benzin 58%, resin 41.5%, lead oxld .5%; a compound B consisting of benzin 48%, resin 51.4%, nickel oxid 13%; andbeeswax; the main compound comprising 12.5% of com: pound A, of compound B and 12.5% beeswax.

In witness whereof, I hereunto subscribe my name this 9th day of April, A. D., 1914.

GEORGE VIRNEBURG.

- Witnesses:

LESLIE W. FRICKE. CAMERON A. WHITSE'II. 

